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답안 #336617

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
336617 2020-12-16T02:52:17 Z alishahali1382 수도 (JOI20_capital_city) C++14
11 / 100
 3000 ms 38892 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod=1000000007;
const int MAXN=200010, LOG=20;

int n, m, k, u, v, x, y, t, a, b, ans=inf, shit;
int C[MAXN], mark2[MAXN], mark3[MAXN], ted[MAXN];
bool dead[MAXN], dead2[MAXN], mark[MAXN];
int par[MAXN], sz[MAXN];
vector<int> G[MAXN], V[MAXN];

int dfs1(int node, int par){
	sz[node]=1;
	for (int v:G[node]) if (v!=par && !dead[v]) sz[node]+=dfs1(v, node);
	return sz[node];
}
int Centroid(int node, int par, int n){
	for (int v:G[node]) if (v!=par && !dead[v] && sz[v]*2>n) return Centroid(v, node, n);
	return node;
}
inline void addc(int c){
	if (mark2[c]==shit) ted[c]++;
	else mark2[c]=shit, ted[c]=1;
}
void dfs2(int node){
	mark[node]=0;
	addc(C[node]);
	for (int v:G[node]) if (v!=par[node] && !dead[v]){
		par[v]=node;
		dfs2(v);
	}
}
void Decompose(int root){
	root=Centroid(root, root, dfs1(root, root));
//	debug(root)
	shit++;
	if (!dead2[C[root]]){
		par[root]=0;
		dfs2(root);
		vector<int> vec={C[root]};
		mark3[C[root]]=shit;
		int res=0, bad=0;
		while (vec.size() && !bad){
			int c=vec.back();
			vec.pop_back();
			if (V[c].size()!=ted[c] || dead2[c]){
				bad=1;
				break ;
			}
//			debug(c)
			res++;
			for (int v:V[c]){
				while (v && !mark[v]){
					if (mark3[C[v]]!=shit){
						int cc=C[v];
						vec.pb(cc);
						mark3[cc]=shit;
					}
					v=par[v];
				}
				if (bad) break ;
			}
		}
		dead2[C[root]]=1;
		if (!bad) ans=min(ans, res);
	}
	dead[root]=1;
	for (int v:G[root]) if (!dead[v]) Decompose(v);
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin>>n>>k;
	for (int i=1; i<n; i++){
		cin>>u>>v;
		G[u].pb(v);
		G[v].pb(u);
	}
	for (int i=1; i<=n; i++) cin>>C[i], V[C[i]].pb(i);
	Decompose(1);
	cout<<ans-1<<"\n";
	
	return 0;
}

Compilation message

capital_city.cpp: In function 'void Decompose(int)':
capital_city.cpp:65:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   65 |    if (V[c].size()!=ted[c] || dead2[c]){
      |        ~~~~~~~~~~~^~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct
11 Correct 9 ms 9964 KB Output is correct
12 Correct 10 ms 9964 KB Output is correct
13 Correct 8 ms 9964 KB Output is correct
14 Correct 9 ms 10092 KB Output is correct
15 Correct 9 ms 9964 KB Output is correct
16 Correct 9 ms 9964 KB Output is correct
17 Correct 10 ms 9984 KB Output is correct
18 Correct 9 ms 9964 KB Output is correct
19 Correct 9 ms 9964 KB Output is correct
20 Correct 9 ms 9964 KB Output is correct
21 Correct 12 ms 9964 KB Output is correct
22 Correct 9 ms 10092 KB Output is correct
23 Correct 9 ms 10092 KB Output is correct
24 Correct 9 ms 9964 KB Output is correct
25 Correct 11 ms 10092 KB Output is correct
26 Correct 11 ms 10092 KB Output is correct
27 Correct 11 ms 10112 KB Output is correct
28 Correct 10 ms 9964 KB Output is correct
29 Correct 10 ms 9964 KB Output is correct
30 Correct 14 ms 9964 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 521 ms 38252 KB Output is correct
2 Correct 187 ms 38892 KB Output is correct
3 Correct 511 ms 38176 KB Output is correct
4 Correct 185 ms 38892 KB Output is correct
5 Execution timed out 3072 ms 35188 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 59.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct
11 Correct 9 ms 9964 KB Output is correct
12 Correct 10 ms 9964 KB Output is correct
13 Correct 8 ms 9964 KB Output is correct
14 Correct 9 ms 10092 KB Output is correct
15 Correct 9 ms 9964 KB Output is correct
16 Correct 9 ms 9964 KB Output is correct
17 Correct 10 ms 9984 KB Output is correct
18 Correct 9 ms 9964 KB Output is correct
19 Correct 9 ms 9964 KB Output is correct
20 Correct 9 ms 9964 KB Output is correct
21 Correct 12 ms 9964 KB Output is correct
22 Correct 9 ms 10092 KB Output is correct
23 Correct 9 ms 10092 KB Output is correct
24 Correct 9 ms 9964 KB Output is correct
25 Correct 11 ms 10092 KB Output is correct
26 Correct 11 ms 10092 KB Output is correct
27 Correct 11 ms 10112 KB Output is correct
28 Correct 10 ms 9964 KB Output is correct
29 Correct 10 ms 9964 KB Output is correct
30 Correct 14 ms 9964 KB Output is correct
31 Correct 521 ms 38252 KB Output is correct
32 Correct 187 ms 38892 KB Output is correct
33 Correct 511 ms 38176 KB Output is correct
34 Correct 185 ms 38892 KB Output is correct
35 Execution timed out 3072 ms 35188 KB Time limit exceeded
36 Halted 0 ms 0 KB -